WO2008010686A1 - Procédé et système de procédure d'établissement de connexion efficace pour appels à terminaison sur mobile - Google Patents

Procédé et système de procédure d'établissement de connexion efficace pour appels à terminaison sur mobile Download PDF

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Publication number
WO2008010686A1
WO2008010686A1 PCT/KR2007/003516 KR2007003516W WO2008010686A1 WO 2008010686 A1 WO2008010686 A1 WO 2008010686A1 KR 2007003516 W KR2007003516 W KR 2007003516W WO 2008010686 A1 WO2008010686 A1 WO 2008010686A1
Authority
WO
WIPO (PCT)
Prior art keywords
access
message
sequence
connection setup
page
Prior art date
Application number
PCT/KR2007/003516
Other languages
English (en)
Inventor
Sudhir Kumar Baghel
Tirumala Sree Hari Vara Prasad Vadlapudi
Original Assignee
Samsung Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to US12/374,625 priority Critical patent/US8199703B2/en
Priority to KR1020087031442A priority patent/KR101357888B1/ko
Publication of WO2008010686A1 publication Critical patent/WO2008010686A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/022—One-way selective calling networks, e.g. wide area paging
    • H04W84/027—One-way selective calling networks, e.g. wide area paging providing paging services

Definitions

  • the present invention in general relates to a method and system for improved connection setup procedure while responding for a page (i.e. for mobile terminated calls) . More particularly this invention relates to a method and system for efficient connection setup procedure for mobile terminated (MT) calls, with reduced probability of collision during access attempt.
  • MT mobile terminated
  • Access Network sends Page message to an Access Terminal (AT), page message contains unique ATI of the paged AT
  • AT selects one access sequence (randomly) and sends access sequence as preamble (with power ramping procedure, if probe is not reaching to AN)
  • Selected access sequence belongs to one of the sets, as all available access sequences are partitioned into sets based on pilot strength level and buffer requirement of the application.
  • AN sends Access Grant (AG) message once access probe is received by it.
  • AG message has the same access sequence sent by AT.
  • AG message may also contain timing information and resources for AT to transmit in the reverse direction. These resources are to be used for exchanging Bind Request/Response messages.
  • Bind Request (and ConnectionOpenRequest) message to AN. AT sends its unique ATI, and MAC ID (which it has received in AG message). 5. Bind Response is sent by AN to acknowledge Bind request message. Bind Request/ Bind Response mechanism ensures that there is no collision during access attempt.
  • AN sends ConnectionOpenResponse message to AT (ConnectionOpenResponse message can be sent as part of Bind Response message or it can be sent as a separate message. This option is provided because MAC ID provided in the AG message expires in 100 ms, and AN may take longer time to find the session related information of AT before AN can send ConnectionOpenResponse message).
  • Collision is a phenomenon when more than one AT uses the same Access Sequence to send their access probe at the same time.
  • AN may detect only one of those access probes.
  • AN will respond with an AG message containing the access sequence corresponding to the detected access probe. But this AG message may be received by more than one AT who have used the same access sequence to send the access probe.
  • all those ATs will treat the AG as a response to their access probe and will go to next step in the connection setup procedure and all of them will claim the MAC ID provided in the AG message. This is the cause of collision during access attempt.
  • Bind Request/Response mechanism is provided.
  • Access probe has no payload and it carries only a 10 bit random AccessSequence.
  • AccessGrant may contains MAC ID, Time offset (for RL OFDM waveform to be within cyclic prefix) and AccessSequence (to distinguish between multiple users who may have sent access probe at the same time).
  • Access probe and access grant exchange provides to the AT; Dedicated RCC (RL Control Channel) resources (for CQI reporting, REQ channel to request RL OFDM tones), Closed loop power control, Ability for RL/FL unicastdata exchange. From lower layers perspective, connection between sector and AT is established once MAC ID is assigned.
  • Access probe and Access grant exchange does not provide: -Knowledge of Unique ATI to the sector (Sector does not know session (QoS, security) information),
  • the present technique generally relates to telecommunication systems and in particular to a method and system for efficient connection setup procedure for mobile terminated calls.
  • a new connection setup mechanism in response to page message i.e. for Mobile Terminated call
  • a page message is sent from AN containing one Access Sequence along with unique ATI of the paged AT.
  • the Access Sequence is selected from a pool of access sequences which are reserved and can only be allocated by AN. In this way collision during Access Attempt is avoided (Also AN knows that this access procedure is in response to page as access attempt is made with the Access Sequence sent in the page message).
  • Bind Request/Response which results in reduced connection setup time, even if it is required to send Bind Request/Response (and hence Connection Request/Response) then also sending reserved access sequence in the page message has many advantages, e.g. reduced overall collision probability, reduced access probe detection threshold at AN (this is because AN knows it has sent a page message with a particular access sequence so it is waiting for that specific access sequence hence making the detection of the probe easier.
  • Access Sequences can be reserved and these Access Sequences will be assigned by AN to AT in the page message along with unique ATI.
  • the proposed mechanism i.e. reserving few access sequences out of available access sequences and sending one sequence per paged AT can still be applicable.
  • Efficient usage of available bits is possible by sending one access sequence, which can be called as base access sequence and it will be applicable for the first ATI in the page packet; rest of the pegged ATs can derive their respective reserved access sequence by applying simple arithmetic of adding it's location in the page packet to the base sequence number. Further optimization is possible in the form of indexing the reserved access sequence; in this way instead of sending complete access sequence in the page packet one index can be sent which can be represented with less number of bits.
  • reverse resource allocation is sent along with page which can directly be utilized to request further resources from AN.
  • This approach can even remove the need for sending Access Probe and Access Grant exchange hence reduces the connection setup time to a good extent.
  • Figure 5 shows this scenario.
  • this invention explains a method for efficient connection setup procedure for mobile terminated (MT) calls comprising the steps of :
  • Figure 1 indicates Current Connection Setup Procedure for MT Call
  • Figure 2 indicates Proposed Connection Setup Procedure- 1 for MT Call
  • Figure 3 indicates Proposed Connection Setup Procedure-2 for MT Call
  • Figure 4 indicates Proposed Connection Setup Procedure-3 for MT Call
  • Figure 5 indicates Proposed Connection Setup Procedure-4 for MT Call
  • connection setup time is possible by reserving some of the Access Sequences, and using them only to send in page message along with full unique ATI.
  • These reserved Access Sequences will be used by AN to direct the paged ATs to do the access attempt by using this access sequence and hence there is no question of collision during access attempts.
  • AT uses this Access Sequence to send access probe in the form of preamble. Since AN knows that which Access Sequence is assigned to which AT, when the access probe with this access sequence is received by AN, access probe can directly be treated as ConnectionOpenRequest message. AN sends the AG message in response to access. Upon reception of AG message, AT stops Access attempts. AG message can be considered as ConnectionOpenResponse.
  • Bind request/ response message exchanges can be avoided as AT and AN knows information related to unique ATI, MAC ID, Access Sequence etc.
  • Figure 2 shows message exchanges during this case, if it is required to send Bind Request/Response (and hence Connection Request/Response) then also sending reserved access sequence in the page message has many advantages, e.g. reduced overall collision probability, reduced access probe detection threshold at AN (this is because AN knows it has sent a page message with a particular access sequence so it is waiting for that specific access sequence hence making the detection of the probe more probable. Some times it is desirable to send page messages to many ATs simultaneously in a single page packet. In this type of scenario, the proposed mechanism i.e.
  • reverse resource allocation is sent along with page which can directly be utilized to request further resources from AN.
  • This approach can even remove the need for sending Access Probe and Access Grant exchange hence reduces the connection setup time to a good extent.
  • the disadvantage associated with this embodiment is time and power estimation in both AT and AN.
  • Access Probe and AG message are used to estimate time difference between AT and AN 5 also AT gets the estimation for power required to transmit on the reverse direction. If power and time estimates are available then this mechanism is the best one to be used. Also, this method is very useful when AN has a good estimate of AT's location at sector level.

Abstract

Systèmes de télécommunications et en particulier procédé et système de procédure d'établissement de connexion efficace pour appels à terminaison sur mobile. Le procédé proposé est caractérisé en ce qu'un message de recherche issu du réseau d'accès contient une séquence d'accès et une identité de terminal d'accès ou un identificateur de terminal d'accès unidiffusion (UATI) du terminal d'accès recherché. Lorsque plusieurs terminaux d'accès utilisent la même séquence pour l'envoi de leur sonde d'accès au même moment, il existe un risque de collision. Le réseau d'accès sélectionne des séquences d'accès dans un groupe réservé pour conduire le terminal d'accès recherché à effectuer la tentative d'accès afin d'éviter les collisions durant les tentatives d'accès. Avec un tel groupage de ressources, il n'est pas nécessaire d'envoyer une demande de liaison et on peut ainsi réduire le temps d'établissement de connexion.
PCT/KR2007/003516 2006-07-21 2007-07-20 Procédé et système de procédure d'établissement de connexion efficace pour appels à terminaison sur mobile WO2008010686A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/374,625 US8199703B2 (en) 2006-07-21 2007-07-20 Method and system for efficient connection setup procedure for mobile terminated (MT) calls
KR1020087031442A KR101357888B1 (ko) 2006-07-21 2007-07-20 이동국 종단 호를 위한 연결 설정 방법 및 시스템

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1262/CHE/2006 2006-07-21
IN1262CH2006 2006-07-21

Publications (1)

Publication Number Publication Date
WO2008010686A1 true WO2008010686A1 (fr) 2008-01-24

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Application Number Title Priority Date Filing Date
PCT/KR2007/003516 WO2008010686A1 (fr) 2006-07-21 2007-07-20 Procédé et système de procédure d'établissement de connexion efficace pour appels à terminaison sur mobile

Country Status (3)

Country Link
US (1) US8199703B2 (fr)
KR (1) KR101357888B1 (fr)
WO (1) WO2008010686A1 (fr)

Cited By (1)

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CN101932125A (zh) * 2010-08-10 2010-12-29 中兴通讯股份有限公司 移动终呼的建立方法及系统

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
KR102116448B1 (ko) 2019-12-10 2020-05-28 원태환 막주름 조절이 가능한 막구조물
KR102139823B1 (ko) 2020-01-08 2020-07-30 원태환 워터 스토퍼를 구비한 막구조물

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US20030223427A1 (en) * 2002-06-03 2003-12-04 Samsung Electronics Co., Ltd. Method for allocating UATI in a mobile communication system for high-speed data transmission
US20050141546A1 (en) * 2003-12-31 2005-06-30 Lg Electronics Inc. Method of avoiding collisions between access terminals
KR20050115680A (ko) * 2004-06-04 2005-12-08 엘지전자 주식회사 １ｘＥＶ-ＤＯ 무선 인터넷 서비스의 ＵＡＴＩ자원 관리방법
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101932125A (zh) * 2010-08-10 2010-12-29 中兴通讯股份有限公司 移动终呼的建立方法及系统
CN101932125B (zh) * 2010-08-10 2014-09-10 中兴通讯股份有限公司 移动终呼的建立方法及系统

Also Published As

Publication number Publication date
US20100097984A1 (en) 2010-04-22
US8199703B2 (en) 2012-06-12
KR101357888B1 (ko) 2014-02-03
KR20090030274A (ko) 2009-03-24

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